Warning on Breslin Header Bolts!
#1
Warning on Breslin Header Bolts!
I went to install my 3/4 inch breslin header bolts and when I went to put the 2nd one in it went in fine, but as I started to torque it down it started spinning freely. I backed it out immediately and saw it had striped a thread off (aluminum still stuck to the bolt threads). So now hopefully my tap works right and I can fix it.
I measured the Breslin Bolt and it was 2-3mm longer than 3/4 inch. that 2-3 mm or so was enough to strip one of my head bolt holes.. I'd be very wary of using these.
I measured the Breslin Bolt and it was 2-3mm longer than 3/4 inch. that 2-3 mm or so was enough to strip one of my head bolt holes.. I'd be very wary of using these.
#5
#10
I went to install my 3/4 inch breslin header bolts and when I went to put the 2nd one in it went in fine, but as I started to torque it down it started spinning freely. I backed it out immediately and saw it had striped a thread off (aluminum still stuck to the bolt threads). So now hopefully my tap works right and I can fix it.
I measured the Breslin Bolt and it was 2-3mm longer than 3/4 inch. that 2-3 mm or so was enough to strip one of my head bolt holes.. I'd be very wary of using these.
I measured the Breslin Bolt and it was 2-3mm longer than 3/4 inch. that 2-3 mm or so was enough to strip one of my head bolt holes.. I'd be very wary of using these.
#11
I went to install my 3/4 inch breslin header bolts and when I went to put the 2nd one in it went in fine, but as I started to torque it down it started spinning freely. I backed it out immediately and saw it had striped a thread off (aluminum still stuck to the bolt threads). So now hopefully my tap works right and I can fix it.
I measured the Breslin Bolt and it was 2-3mm longer than 3/4 inch. that 2-3 mm or so was enough to strip one of my head bolt holes.. I'd be very wary of using these.
I measured the Breslin Bolt and it was 2-3mm longer than 3/4 inch. that 2-3 mm or so was enough to strip one of my head bolt holes.. I'd be very wary of using these.
If using 3/4" bolts and a good header with a nice flange I would sooner thing you put too much torque on it without enough threads sunk. If you use a good header with a 3/8" flange and a decent gasket will be at least another 1/16" leaving just 5/15" at best and the gaskets I like are closer to 1/8" thick meaning just 1/4" left for the head.
I am going to say there was some sort of operator error here not the bolts to blame.
That said trick bolts are made for people who do not bother to understand what happens to cause header bolts to loosen if you understood thing you would be happy with a $8 set of bolts and not have any problems.
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